螺杆泵井驱动杆柱的偏磨和断裂动力学分析  

Dynamics analysis on partial abrasion and fracture of driving rod in screw pump wells

作　　者：王伟章[1] 闫相祯[2] 王海文[3] 张先锋[2] 

机构地区：[1]中国石油大学机电工程学院,山东东营257061 [2]中国石油大学储运与建筑工程学院,山东东营257061 [3]中国石油大学石油工程学院,山东东营257061

出　　处：《中国石油大学学报（自然科学版）》2008年第2期97-101,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：中国石油天然气集团公司重点实验室资助项目(05A40201)

摘　　要：油管或油杆的偏斜被认为是驱动杆柱偏磨和断裂的主要原因,但现有的防治方法不能从根本上解决其偏磨及断裂问题。根据驱动杆柱动力学理论,分析认为横向振动对驱动杆柱的偏磨和疲劳断裂有重要影响。建立了驱动杆柱的横向振动模型,提出了根据横向振动频率计算驱动杆柱临界转速的方法和通过控制驱动杆柱的转速来控制驱动杆柱的横向振动的防偏磨和断裂的方法,同时针对驱动杆柱的疲劳断裂现象,用安全系数法对其进行校核计算,从动力学角度为螺杆泵井驱动杆柱的偏磨和断裂问题提供了解决方法。The deviation of tubing or oil rod was considered to be the main reason for the partial abrasion and fracture of driving rod, but the corresponding prevention method can＇t solve the partial abrasion and fracture problem radically. The dynamic factors of the driving rod were analyzed. The results show that the lateral vibration of driving rod is the principal reason of its partial abrasion and fatigue fracture. A lateral vibration model of driving rod was established and a method of calculating the critical rotate speed of the driving rod based on the lateral vibration frequency was proposed. Thus, the lateral vibration of driving rod can be controlled through controlling its rotate speed. Meanwhile, check calculation was performed based on the safety factor method, which provides a solution for the problem of partial abrasion and fracture of driving rod from the dynamic view.

关 键 词：螺杆泵井 驱动杆柱 偏磨 疲劳断裂 横向振动 

分 类 号：TE933.3[石油与天然气工程—石油机械设备]